摘要
与常规泵站不同,增压泵站具有单体较多、开挖深度不一及平面形状不规则等特点,采用沉井法或基坑支护法单独实施时,会产生施工方式不合理、工程成本较高或工期较长等问题.本文结合某增压泵站工程案例,从安全、经济、便捷等角度对沉井法、基坑支护法及沉井+基坑支护法等方案进行对比分析,提出了一种沉井与基坑支护相结合的结构形式.该结构形式不仅具有沉井结构工程成本低、施工便捷的优势,还具有基坑支护结构形式灵活、便于保护周边环境的优点;同时也为类似工程项目的结构选型提供了一种新的思路.
Abstract
Unlike conventional pumping stations,booster pump stations have the characteristics of having many individual units,varying excavation depths,and irregular plane shapes.When open caisson or foundation pit support is applied seperately problems such as unreasonable construction methods,high engineering costs,or long construction periods may arise.This paper compared the methods of open caisson,foundation pit support,and the combination of the above two methods from the perspectives of safety,cost and convenience,based on a case study of a booster pump station project.Finally,the combined method of open caisson and foundation pit support was proposed.The successful implementation of the case demonstrated that the combined method not only has the advantages of the open caisson,but also has the advantages of foundation pit support;More impor-tantly,it provides a new ideas for the structural selection of underground engineering.
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